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EP3244733B1 - Composition antimicrobienne pour le nettoyage d'une surface dure - Google Patents

Composition antimicrobienne pour le nettoyage d'une surface dure Download PDF

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Publication number
EP3244733B1
EP3244733B1 EP16700125.4A EP16700125A EP3244733B1 EP 3244733 B1 EP3244733 B1 EP 3244733B1 EP 16700125 A EP16700125 A EP 16700125A EP 3244733 B1 EP3244733 B1 EP 3244733B1
Authority
EP
European Patent Office
Prior art keywords
composition
surfactant
sodium aluminate
soap
compositions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16700125.4A
Other languages
German (de)
English (en)
Other versions
EP3244733A1 (fr
Inventor
Manoj Vilas Dagaonkar
Emma Lewis
Srilaxmi Venkata Medepalli
Suresh Murigeppa Nadakatti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever NV
Original Assignee
Unilever NV
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Filing date
Publication date
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Publication of EP3244733A1 publication Critical patent/EP3244733A1/fr
Application granted granted Critical
Publication of EP3244733B1 publication Critical patent/EP3244733B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/06—Aluminium; Calcium; Magnesium; Compounds thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants

Definitions

  • the invention relates to a composition for cleaning hard surfaces and particularly to a composition having antimicrobial activity.
  • An effective disinfectant or antimicrobial agent is one which when used at very low levels causes about 100,000 fold (i.e., 5 log) or even greater reduction in the number of viable microorganisms in a specified culture. This activity or efficacy is generally expressed in terms of the log kill or the log reduction value.
  • Compositions which provide hygiene generally include one or more surfactant and one or more antimicrobial agent. Toilets and bathrooms are amongst the usual places where bacteria proliferate rapidly. Liquid disinfectants and cleaning compositions are widely used to clean such places. Some more common hard surfaces that are cleaned by such compositions include utensils, floors, walls, windows, doors, table tops and other furniture.
  • Surfactants are weak biocides. Therefore it is common to include antimicrobial agents in hard surface cleaning compositions which contain surfactants.
  • the composition also contains a medium or a carrier comprising solvents or paste/gel-forming ingredients.
  • Hydrogen peroxide is an environment-friendly antimicrobial agent but needs to be in contact with the surface for longer time or the user needs to ensure that its concentration is high enough.
  • Popular disinfecting and sanitizing agents like bleach and phenols are also widely used but they are very strong and are often considered to be equally harsh.
  • WO02/080668 A1 Korean Cellulose phosphates
  • WO02/080668 A1 Korean Cellulose phosphates
  • WO02/080668 A1 discloses that combination of a proton donating agent with alkyl phosphates leads to an effective antimicrobial.
  • it discloses antimicrobial action of citric and malic acid and mono alkyl phosphate against S. aureus, S. epidermidis and E.coli. These are some of the most common Gram positive and negative bacteria.
  • South African patent ZA9700280 (Unilever, 1998) discloses a soap bar containing 2% sodium lauryl ether sulphate (SLES) and 3% sodium aluminate.
  • Table-1 of this patent discloses the starting materials for a finished product. The sodium aluminate reacts with alkaline silicate leading to in-situ generation of sodium aluminosilicate in the disclosed detergent bar which is the finished product. Therefore the finished product does not have any aluminate.
  • WO0246341 A2 discloses a process for the manufacture of low density detergent compositions with in situ generation of borosilicate as a structuring system, in presence of an aluminium and/or phosphate salt to obtain boroaluminosilicate or boroaluminophospho-silicate and it is said to impart superior properties such as good process ability, in-use properties and improved water retention capacity.
  • US3799902 A discloses coating compositions comprising sodium aluminate, polymeric latex composed of anionic vinyl addition polymer, a water-soluble cationic polymer.
  • the coating compositions are in the form of films which may be cast on glass, metals, fibres such as cloth and paper.
  • US4126574 discloses cation-exchanging, water-insoluble aluminosilicates containing bound water and an ionic surface-active compound resistant to water hardness formers. It is produced by the precipitation of aluminosilicate in an aqueous solution in the presence of an aqueous solution of the ionic surface-active compound.
  • compositions containing a small quantity of a non-soap surfactant and a small quantity of a particular alkaline builder surprisingly provides broad spectrum antibacterial benefits. This property makes the compositions according to the invention highly suitable for cleaning hard surfaces in a safe and effective manner. In view of the significantly lower surfactant content, practically no foam is generated during use.
  • an antimicrobial composition having total fatty matter less than 10 wt%, the composition includes:
  • the ratio between total non-soap surfactant content and the total sodium aluminate content is from 1:0.4 to 1:20000 parts by weight.
  • home or place of work e.g., office
  • any kind of surface such as kitchen, bathroom, floor, carpet, wall, tile, window, cupboard, sink, shower, wash basin, WC, fixtures and fittings made of ceramic, vinyl, linoleum, melamine, glass, Formica®, vitroceramic, plastic, plastified wood, metal or any painted or varnished surface.
  • the surfaces also include household appliances including, but not limited to refrigerators, freezers, washing machines, automatic dryers, ovens, microwave ovens and dishwashers.
  • TFM This term is often abbreviated as TFM and it denotes the percentage by weight of fatty acid and triglyceride residue present in a composition without taking into account the accompanying cations.
  • This term is usually associated with soap (personal wash or laundry) bars which contain high amount of soap, i.e., saponified fatty acids.
  • soap personal wash or laundry
  • saponified fatty acids i.e., saponified fatty acids.
  • the TFM content of any composition is attributed to or indicates, more or less, the soap content.
  • surfactants like sodium lauryl ether sulphate and linear alkyl benzenesulphonates also add to the total TFM content.
  • non-soap means that the surfactant is not soap-based.
  • compositions contain 0.00025 to 5 wt% non-soap surfactant and more preferred compositions contain 0.0005 to 4 wt% non-soap surfactant.
  • non-soap surfactant is other than non-ionic because it is found that compositions containing non-ionic surfactant and sodium aluminate do not show appreciable activity against Gram positive and negative bacteria at lower levels of non-ionic surfactant and sodium aluminate.
  • the non-soap surfactant is at least one of anionic, amphoteric or cationic surfactant, but it can also be any combination of any two or more of the above-mentioned types of surfactants.
  • the non-soap surfactant is included for primary cleaning action by emulsification of oil/oily residue attached to the concerned substrate.
  • the non-soap surfactant is anionic surfactant.
  • the composition contains 0.2 wt% to 3.0 wt% anionic surfactant. More preferred compositions contain 1.0 wt% to 3.0 wt% anionic surfactant.
  • the anionic surfactant is one or more of linear alkylbenzene sulphonate, an alkoxylated sulphate, an alpha olefin sulphonate or a sulphonated ester.
  • anionic surfactants include linear or modified, e. g., branched, alkylbenzene sulphonates, alkylpoly(ethoxylates), sodium lauryl ether sulphate, methyl ester sulphonate and primary alkyl sulphates. It is particularly preferred that the anionic surfactant is a linear alkyl benzene sulphonate.
  • the non-soap surfactant is an amphoteric surfactant.
  • Suitable amphoteric surfactants include derivatives of aliphatic secondary and tertiary amines containing an alkyl group of 8 to 18 carbon atoms and an aliphatic radical substituted by an anionic water-solubilising group, such as sodium 3-dodecylamino-propionate, sodium 3-dodecylaminopropane sulphonate and sodium N-2-hydroxydodecyl-N-methyltaurate.
  • amphoteric surfactants include derivatives of aliphatic quaternary ammonium, sulphonium and phosphonium compounds having an aliphatic radical of from 8 to 18 carbon atoms and an aliphatic radical substituted by an anionic water-solubilising group, for instance 3-(N-N-dimethyl-N-hexadecylammonium) propane-1-sulphonate betaine, 3-(dodecylmethyl sulphonium) propane-1-sulphonate betaine and 3-(cetylmethylphosphonium) ethane sulphonate betaine.
  • anionic water-solubilising group for instance 3-(N-N-dimethyl-N-hexadecylammonium) propane-1-sulphonate betaine, 3-(dodecylmethyl sulphonium) propane-1-sulphonate betaine and 3-(cetylmethylphosphonium) ethane sulphonate betaine.
  • amphoteric surfactant is a betaine. Cocoamido propyl betaine is a preferred betaine.
  • compositions which contain amphoteric surfactant as the sole non-soap surfactant it is preferred that the composition contains 0.2 wt% to 1 wt% amphoteric surfactant.
  • non-soap surfactant is a cationic surfactant.
  • a cationic surfactant it is preferred that such compositions contain 0. 0025 wt% to 0.1 wt% cationic surfactant.
  • Preferred cationic surfactants are quaternary ammonium surfactants. It is preferred that the cationic surfactant is a alkyl trimethyl ammonium halide, especially cetyl trimethyl ammonium chloride.
  • the cationic surfactant is a benzalkonium halide, more preferably benzalkonium chloride.
  • the composition contains 0.25 to 5 wt% sodium aluminate. It is an inorganic alkaline material (alkaline builder) having pH > 11 and reserve alkalinity > 45 in 1% aqueous solution.
  • the composition is highly alkaline due to presence of sodium aluminate.
  • compositions have 0.5.to 4 wt% of sodium aluminate.
  • ratio of the total non soap surfactant content to the total sodium aluminate content in the composition is from 1:0.4 to 1:20000 parts by weight. It is further preferred that this ratio is from 1:0.4 to 1:2000 and further more preferably from 1:0.4 to 1:1000 parts by weight. These ratios provide broad spectrum antibacterial activity at lower concentration of surfactant and aluminate.
  • the non-soap surfactant is solely an anionic surfactant, especially linear alkyl benzene sulphonate
  • the ratio is from 1:0.66 to 1:25 parts by weight.
  • the ratio is towards the lower end of 1:0.66 parts by weight in the case of compositions which contain more surfactant.
  • the preferred ratio is 1:1.5 to 1:1.8 at linear alkyl benzene sulphonate content of 2.0 wt%.
  • the ratio is 1.0.66 to 1:1.2 at linear alkyl benzene sulphonate content of 3.0 wt%.
  • compositions in accordance with this invention contain anionic surfactant as the sole surfactant, then it is preferred that such compositions contain 0.2 wt% to 3 wt% anionic surfactant and 1 wt% to 5 wt% sodium aluminate.
  • compositions in accordance with this invention contain cationic surfactant as the sole surfactant, then it is preferred that such compositions contain 0.00025 wt% to 0.001 wt% cationic surfactant and 0.25 wt% to 0.5 wt% sodium aluminate.
  • non-soap surfactant is solely a cationic surfactant, especially benzalkonium halide and particularly benzalkonium chloride
  • the preferred ratio is from 1:250 to 1:2000.
  • compositions in accordance with this invention contain amphoteric surfactant as the sole surfactant, then it is preferred that such compositions contain 0.01 wt% to 0.5 wt% amphoteric surfactant and 0.25 wt% to 0.5 wt% sodium aluminate.
  • compositions in accordance with the invention also contain a carrier.
  • the carrier could be any ingredient or combination of ingredients which serve as a base for the composition.
  • the carrier can be water. In such cases the preferred compositions have 10 to 99 wt% water or even more water to make up the balance of the composition to 100 wt%.
  • Non-limiting examples of other carriers include other common paste/gel forming ingredients. These ingredients would vary based on the nature of the composition.
  • the composition may preferably also have an abrasive or combination of abrasives.
  • the abrasive may be soluble or insoluble in water.
  • Water soluble abrasives are usually present in such excess to the quantity of water present in the composition that solubility of the abrasive in the aqueous phase is exceeded and consequently the abrasive exists in the composition.
  • Moh's index of the abrasive is at least 3.0.
  • Preferred abrasives include calcite, dolomite, feldspar, silica, aluminium oxide, amalgam, anatase, apatite, boron carbide, corundum (natural aluminium oxide), crystolon, cuttlebone, diamond, diopside, emery, enamel, enstatite, fluorite, garnet, glass bead, glass, hematite, kyanite, magnetite, olivine, orthoclase, petalite, porcelain, feldspathic , pyrite, pumice, quartz, silica sand, silicon carbide, spinel, spodumene, staurolite, topaz, titanium dioxide, tungsten carbide, zirconium silicate, zirconia, particulate zeolites, silicates, other carbonates, bicarbonates, borates, sulphates and polymeric materials such as polyethylene.
  • Calcite, dolomite, feldspar, alumina and silica are the most preferred abrasives.
  • compositions according to the invention contain 20 wt% to 70 w% abrasive.
  • pH of 1% aqueous solution of the hard surface cleaning composition at 25 °C is from 10 to 13.
  • the hard surface cleaning composition may further have other conventional ingredients like perfume, colour, electrolytes, structuring agents and fillers.
  • the conventional ingredients could vary depending on the nature of the composition.
  • the invention relates to use of an antimicrobial composition of the first aspect as a broad spectrum antibacterial agent on an inanimate hard surface.
  • an antimicrobial composition of the first aspect for use as a broad spectrum antibacterial agent.
  • composition provides at least 5 log reduction in bacterial count of at least some Gram positive bacteria and at least some Gram negative bacteria.
  • composition provides at least 5 log reduction in bacterial count of at least one of S. aureus and E.hirae and at least one of E . coli and P. aeruginosa.
  • composition acts against Gram positive as well as Gram negative bacteria.
  • Gram-positive bacteria belong to a class of bacteria that take up crystal violet stain used in the Gram staining method of bacterial differentiation.
  • the thick peptidoglycan layer in the cell wall that encases their cell membrane retains the stain making definitive identification possible.
  • Gram-negative bacteria do not retain the violet stain after the decolorization step, as alcohol used in the decolourisation process degrades the outer membrane of gram-negative cells making the cell wall more porous and incapable of retaining the crystal stain.
  • E. aureus and E.hirae are well known bacteria of the positive type.
  • E. coli and P. aeruginosa are well-known examples of the negative type.
  • composition may be in the form of a aqueous or non-aqueous liquid, bar, powder, cream, paste or gel.
  • composition may be packaged in bottles or pouches or in a jar, box, tray or pouch.
  • Bottles, jars and pouches are preferably provided with a dispenser with or without a closure. This provides easier mode of dispersion and storage for liquid, paste or gel type of compositions. Dispensers with a push-pull closure or a flip-top closure may also be used. Spray or pump-dispensers may also be used.
  • composition may be applied in any known manner such as by using an applicator like cloth, paper, mop, wipes, sponge, scrub, spray, atomizer, or other forms of direct application.
  • an applicator like cloth, paper, mop, wipes, sponge, scrub, spray, atomizer, or other forms of direct application.
  • aqueous composition In order to prepare the aqueous composition described hereinafter, required quantities (grams) of the respective non-soap surfactant and sodium aluminate are mixed with some water. Thereafter enough water is added to make the total weight of the composition 100 grams.
  • test bacteria were grown overnight at 37 °C on a TSA (Tryptic Soya Agar) plate. The grown culture colonies were re-suspended in tryptone diluent. The culture density was adjusted to get the final count of 1.5-5.0 x 10 8 cfu/ml based on McFarland standards (McFarland 1.5 measured using bioMérieux Densomat®). 240 ⁇ l of the test solution was placed into test wells in a micro-titre plate. Equal volumes of test culture and bovine serum albumin (interfering substance) were combined for two minutes, before 60 ⁇ l of the mixture being added to the test solution. After a contact time of five minutes, 30 ⁇ l of the mixture was taken and added to a neutralising solution.
  • TSA Teryptic Soya Agar
  • test bacteria were grown overnight at 37 °C on TSA plate.
  • the grown culture colonies were re-suspended in 0.8% saline solution.
  • the culture density was adjusted to get final count of 1 x 10 ⁇ 8 cfu/ml based on a 620 nm optical density calibration chart (0.8 OD at 620 nm).
  • Nine ml of the test solution was taken in a sterile sample container with the actives at the specific combinations and 1 ml of the test culture was added. After a contact time of five minutes, 1 ml of the mixture was taken and added to a neutralizing solution, D/E broth. This solution was then serially diluted in D/E broth and then plated using TSA.
  • Example 1 Outside the invention (Comparative Examples)
  • Example 3 Inventive compositions inside the invention containing linear alkyl benzene sulphonate (LAS)
  • Table 2 contains details of the formulations which were tested.
  • the TFM of each composition was less than 10 wt% and pH was 11.0.
  • the ratio between total surfactant content and the total sodium aluminate content and the extent of log reduction is also included in table 3.
  • the TFM of each composition was less than 10 wt%.
  • the pH of each composition was 11 to 12. Method-1 was followed.
  • Table 3 LAS/wt% Sodium aluminate/wt% Ratio Log reduction S. aureus E. hirae P. aeruginosa E.
  • Example 4 Inventive composition inside the invention with cationic surfactant and sodium aluminate
  • BKC benzalkonium chloride
  • the TFM of each composition was less than 10 wt%. Method 1 was used to determine the extent of log reduction.
  • the pH of each composition was 11 to 12.
  • Table 4 Surfactant BKC/wt% Sodium aluminate/wt% Ratio Log reduction S. aureus P. aeruginosa BKC 0.00025 0.25 1:1000 >5 >5 0.0005 1:500 >5 >5 0.001 1:250 >5 >5 BKC 0.00025 0.5 1:2000 >5 >5 0.0005 1:1000 >5 >5 >5

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  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Detergent Compositions (AREA)

Claims (9)

  1. Composition antimicrobienne ayant une matière grasse totale inférieure à 10 % en poids, ladite composition comprenant :
    (i) 0,0001 à 5 % en poids d'un tensioactif non savon qui est au moins un de tensioactif anionique, amphotère ou cationique ; et
    (ii) 0,25 à 5 % en poids d'aluminate de sodium.
  2. Composition selon la revendication 1 où le rapport de la teneur totale en tensioactif non savon à la teneur totale en aluminate de sodium est de 1 : 0,4 à 1 : 20000.
  3. Composition selon la revendication 1 ou 2 où ledit tensioactif anionique est un alkylbenzènesulfonate linéaire, un sulfate alcoxylé, un alpha oléfine sulfonate ou un ester sulfoné.
  4. Composition selon la revendication 1 ou 2 où ledit tensioactif amphotère est une bétaïne.
  5. Composition selon la revendication 1 ou 2 où ledit tensioactif cationique est un tensioactif ammonium quaternaire.
  6. Utilisation d'une composition antimicrobienne selon l'une quelconque des revendications 1 à 5 comme agent antibactérien à large spectre sur une surface dure inanimée.
  7. Utilisation selon la revendication 6 où ladite composition procure une réduction d'au moins 5 log dans la numération bactérienne d'au moins certaines bactéries Gram positives et d'au moins certaines bactéries Gram négatives.
  8. Utilisation selon la revendication 7 où ladite composition procure une réduction d'au moins 5 log dans la numération bactérienne d'au moins un de S. aureus et E. hirae et d'au moins un de E. coli et P. aeruginosa.
  9. Composition antimicrobienne selon l'une quelconque des revendications 1 à 5 destinée à être utilisée comme agent antibactérien à large spectre.
EP16700125.4A 2015-01-16 2016-01-08 Composition antimicrobienne pour le nettoyage d'une surface dure Active EP3244733B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15151460 2015-01-16
PCT/EP2016/050258 WO2016113191A1 (fr) 2015-01-16 2016-01-08 Composition antimicrobienne pour le nettoyage de surfaces dures

Publications (2)

Publication Number Publication Date
EP3244733A1 EP3244733A1 (fr) 2017-11-22
EP3244733B1 true EP3244733B1 (fr) 2019-06-26

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ID=52345124

Family Applications (1)

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EP16700125.4A Active EP3244733B1 (fr) 2015-01-16 2016-01-08 Composition antimicrobienne pour le nettoyage d'une surface dure

Country Status (3)

Country Link
EP (1) EP3244733B1 (fr)
TR (1) TR201911154T4 (fr)
WO (1) WO2016113191A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799902A (en) * 1972-01-31 1974-03-26 Nalco Chemical Co Polymeric latices and sodium aluminate
US4126574A (en) * 1973-09-07 1978-11-21 Henkel Kommanditgesellschaft Auf Aktien Surfactant-containing aluminosilicates and process
WO2002046341A2 (fr) * 2000-12-05 2002-06-13 Unilever N.V. Composition detergente solide non granulaire et son procede de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3244733A1 (fr) 2017-11-22
WO2016113191A1 (fr) 2016-07-21
TR201911154T4 (tr) 2019-08-21

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